Rails Multiple Validation

Question

I have a model with two columns 'name' and 'size'. I am trying to validate the uniqueness of size only if name and size together doesn't exist in database.

For example.

Name = Shirt and Size = L are in database then Name = Shirt and Size = L shouldn't pass the unique validation rather Name = Pant and Size = L should pass the uniqueness.

Check this answer: https://stackoverflow.com/questions/4870961/validate-uniqueness-of-multiple-columns — Roc Khalil, Jul 05 '17 at 11:08

score 2 · Answer 1 · answered Jul 05 '17 at 12:38

2

if you want to scope with single column then:

validates_uniqueness_of :name, :scope => :size, message: "should be unique"

for multiple columns:

validates :name, uniqueness: {scope: [:size, :attr1, :attr2]}

answered Jul 05 '17 at 12:38

Gagan Gami

10,121
1
29
55

score 1 · Accepted Answer · answered Jul 05 '17 at 11:10

1

Here you can do just like that

validates :name, uniqueness: { scope: :size,
message: "should be unique" }

answered Jul 05 '17 at 11:10

Tushar Pal

503
6
16

Thanks, its saved my day. – Santosh Aryal Jul 05 '17 at 12:38
your welcome man – Tushar Pal Jul 05 '17 at 12:39

Rails Multiple Validation

2 Answers2